Atlas Copco ZR 200, Инструкция, Страница: 55 / 110

Air consumption divided by compressor free air
delivery Correction factor C
0.5 0.25
0.3 0.20
0.2 0.15
0.1 0.10
4. The inlet grids and ventilation fan should be installed in such a way that any recirculation of
cooling air to the compressor is avoided. The maximum air velocity through the grids is 5
m/s (16.5 ft/s).
The required ventilation capacity (per compressor installed) to limit the compressor room
temperature can be calculated as follows:
For ZR compressors:
• For British/American Units: Qv = 284.5 N/dT
Symbol Explanation
dT Temperature increase in compressor room
• For British/American Units: in °F
N Shaft input of compressor
• For British/American Units: in hp
Qv Required ventilation capacity
• For British/American Units: in cfm
If cooling air ducts are installed, the maximum allowable pressure drop over the ducts is 30
Pa (0.12 in wc). Common ducting for several compressors is not allowed.
5. Lay out the drain piping from the condensate outlets towards the condensate collector. The
drain pipes must not dip into the water in the collector. It is recommended to provide a funnel
to allow visual inspection of the condensate flow.
6. Elektronikon control system with control panel.
7. See
Electric cable size, fuses and cable length for the recommended size of the supply
cables.
Check that the electrical connections meet local codes. The installation must be earthed and
protected against short circuits by fuses in all phases. An isolating switch must be installed
near the compressor.
8. Install a condensate drain valve in the lower part of the air net piping.
9. On ZR compressors, remove the plastic plugs (if fitted) from the compressor water pipes (WI
and WO) and connect the pipes to the cooling water circuit. Fit a valve in the compressor
water inlet pipe and outlet pipe.
4.3 Installation requirements for rubber compensators
Types and sizes
Atlas Copco oil-free air products with aftercooler are equipped with rubber compensators on the
air outlet and water connections.
Types of misalignments
The supplied compensators can cope with 2 types of minor misalignments when the customer
pipe end is mounted:
Instruction book
AIF999999 53